The solid state reaction of NaNO3 and Fe2(C2O4)3 in H atomsphere was studied by gas chromatog., Moessabuer spectroscopy and x-ray diffraction. There is no reaction <240?while Fe2(C2O4)3 is decomposed to a-FeC2O4 and gives off CO2 and H2O at 180? The reaction takes place at 260-300?when NaNO3 oxidizes a-FeC2O4 to an Fe(III) compound and a large amount of CO2 and a little NO and O2 are evolved. Different molar proportion and the size of particles of reactants have no obvious effects on the solid state reaction. Because of the catalyzing effect of the Fe(III) compound, NaNO3 and its reduction product, NaNO2 are decomposed at 380-500?and the Fe(III) compound is transformed into g-Fe2O3 at 460?

Key words: OXYGEN, OXIDATION REDUCTION REACTION, GAS CHROMATOGRAPHY, THERMAL STABILITY, IRON COMPOUNDS, COORDINATE CHEMISTRY, SOLID PHASE REACTION, SODIUM NITRATE, OXALATE, MOSSBAUER SPECTROMETRY